baber/WOPTO huggingface dataset:
Patent GB-437197-A (GB)
Title: Improvements in or relating to the production of methacrylic acid and the alkyl esters thereof
IPC: C07C69/54
Filed: 1934-04-20
Abstract: Methacrylic acid and alkyl esters thereof are manufactured by treating acetone cyanhydrin with an alkyl hydrogen sulphate or a mixture thereof with sulphuric acid at an elevated temperature to produce methacrylamide and heating the product with water or an aliphatic alcohol or preferably with a mixture of water and an aliphatic alcohol.  If the alkyl group of the alcohol is identical with that of the alkyl hydrogen sulphate a single ester will be produced, whilst if it is different a mixture of esters will result. The temperature in the first stage is preferably gradually raised to about 130--140 DEG  C.  The amount of alkyl hydrogen sulphate should be at least one molecular proportion, preferably about 1\ba1/2\be, to one of cyanhydrin, whilst when sulphuric acid is also employed suitable amounts are one molecular proportion of alkyl hydrogen sulphate and \ba1/2\be of acid to one of cyanhydrin.  At least 1\ba1/2\be molecular proportions of the hydrolysing or esterifying medium should be used for each molecular proportion of cyanhydrin originally taken, a suitable amount being 2 molecular proportions of an equimolecular mixture of water and alcohol.  The products may be recovered by distillation or by addition of water or brine.  In examples: (1) and (2) acetone cyanhydrin is reacted with methyl hydrogen sulphate in the presence of copper bronze powder as stabilizer and the product is refluxed with water, yielding methyl methacrylate; (3) and (4) a mixture of water and methyl alcohol is employed in the second stage; (5) and (6) a mixture of methyl hydrogen sulphate and sulphuric acid is employed in the first stage; (7) acetone cyanhydrin is reacted with ethyl hydrogen sulphate and sulphuric acid and the product refluxed with water and ethyl alcohol to produce ethyl methacrylate.
Patent GB-581197-A (GB)
Title: Improvements in the manufacture of lenses
IPC: B29C45/40
Filed: 1944-06-23
Abstract: 581,197. Moulding lenses from polystyrene &c. JOHNSON, J. June 23, 1944, No. 12013. [Class 87 (ii)] A lens mould for an injection-moulding apparatus comprises a fixed platen 16 carrying two or more dies 12, 13, and a movable platen 25 carrying complementary dies 21, 22. When the platens have been brought together, plastic material is forced into the die spaces and pushes back the dies 12, 13, against springs 17, until the dies abut the bases of the die sockets 14, 15. The springs maintain pressure on the dies 12, 13 during cooling and shrinking of the lens. In order to determine with precision the thickness of the lenses, the movement of the dies in their sockets may be limited by adjustable stops. Specifications 416,398, [Group XX], 544,472, 556,743, [Group XI], 560,881, 564,257 and 572,748 are referred to.
Patent GB-1531536-A (GB)
Title: Removal of acidic components from a gas
IPC: B01D53/40
Filed: 1976-03-25
Abstract: 1531536 Removing acidic components from a gas KOPPERS CO Inc 25 March 1976 [27 March 1975] 12141/76 Heading C5E An acid component or components is removed from a gas by (1) contacting the gas with a first stream of alkaline absorbent solution and creating thereby a first fouled solution containing a portion of the acidic components, (2) contacting the treated gas from step (1) with a smaller second stream of alkaline absorbent solution and creating thereby a second fouled solution containing a further portion of the acidic component(s); (3) contacting the second fouled solution with steam under reduced pressure to regenerate an alkaline absorbent solution from the second fouled solution; (4) contacting the first fouled solution with steam from step (3) under reduced pressure after the steam has contacted the second fouled solution to regenerate an alkaline absorbent solution from the first fouled solution; and (5) generating the steam by heating a portion of the second alkaline absorbent solution and flashing it under reduced pressure.
Patent GB-235691-A (GB)
Title: Improvements relating to supports for electric lamps
IPC: F21V21/26
Filed: 1924-05-17
Abstract: 235,691. Hibbert, H. May 17, 1924. Signal, vehicle, and like lamps. - An electric lamp comprises an aluminium or other metal casing g, which has a slot aperture g' and is screwed on a shoulder of the bulbholder e.
Patent GB-552741-A (GB)
Title: A method and means for facilitating the preparation of drawings, plans, sketches and the like
IPC: B44F1/10
Filed: 1941-09-20
Abstract: 552,741. Pictures. CO-OPERATIVE WHOLESALE SOCIETY, Ltd., and TILL, L. A. Sept. 20, 1941, Nos. 12182/41 and 12683/42. [Classes 11 and 146 (iii)] [Also in Group XVI] In the preparation of drawings, pictures, &c. the filling in of stock matter, such as shading or section lining, is facilitated by printing such matter in invisible ink and overprinting it with a discontinuous resist, so that two alternative developments of the invisible matter are possible according to whether the resist is removed or not. The invisible matter may consist of parallel lines A, Fig. 2, over which is printed a pattern of dots B in a resist, such as gum, collodion ,or rubber solution. Upon development, broken lines are produced, as shown in Fig. 3, or, if the resist is first removed, the matter will appear in continuous lines. The resist may have within it a second invisible ink susceptible to a different developer or the drawing material may bear two sets of invisible markings in different inks, one set being overprinted with the resist or both sets being overprinted with different resists. Transparent drawing material may have invisible matter, protected by a resist, on both sides, either or both of which may be developed. A pattern of white dots on a coloured background may be produced by covering the whole sheet with invisible ink, developing and afterwards removing the protecting dots of resist. The resist may be removable by means of a solvent or by mechanical action, as in the case of rubber solution. A suitable rubber composition consists of rubber latex together with kaolin, casein, and thymol. The inks employed require to be bound and thickened to prevent spreading. An ink having a lead base may be suspended in glycerine and thickened with lead carbonate, the developer being a soluble sulphide. An ink composed of sodium sulphide and sodium hyposulphite may be developed by rubbing with a brass pointer. When dispersed in a rubber protector, the ink may consist of lead acetate with a sulphide as developer, or of mercurous nitrate, which is developed by treatment with ammonia. The salts employed as inks may be dissolved in alcohol and introduced into varnish. Specification 551,183 is referred to.
Patent GB-894656-A (GB)
Title: Improvements in or relating to jib cranes
IPC: B66C23/36
Filed: 1959-04-10
Abstract: 894,656. Jib cranes; masted lift trucks. EDEN, J. F. April 6, 1960 [April 10, 1959], No. 12213/59. Classes 78 (3) and 78 (4). The jib 1 of a mobile crane can be luffed rearwardly beyond the vertical to support a load 4 against the jib. The load may comprise a detachable, bottom discharge skip 5 (Fig. 6), or a lifting fork 6 (Fig. 8) which are guided for movement along the jib.
Patent GB-1055630-A (GB)
Title: Content addressed memory system
IPC: G11C11/44
Filed: 1964-03-23
Abstract: 1,055,630. Superconductive circuits. GENERAL ELECTRIC CO. March 23, 1964 [April 11, 1963], No. 12220/64. Heading H3B. [Also in Division G4] The cryotron matrix storage cell disclosed in Specification 1,053,770 is modified by the provision of a by-pass circuit including a cryotron 25, this by-pass circuit being normally enabled, but being disabled to render the cell effective for writing by applying a digit current I to line 33 thus rendering cryotron 25 resistive. Information can therefore be written into selected cells of a selected row of the matrix without disturbing the state of the remaining cells of the row. The memory is employed in associative searches, comparison and recoding operations (see Division G4).
Patent GB-541581-A (GB)
Title: Improved means for centering bars, forgings and the like
IPC: B23B49/04
Filed: 1940-07-27
Abstract: 541,581. Drilling centres. NICHOLSON, V. R. July 27, 1940, No. 12239. [Class 83 (iii)] In centring a work-piece G in a lathe &c. the tailstock centre A mounted in a revoluble spindle B moved up to the work by hand or power is provided with cutting edges and is caused to drill the required centre in the rotating work by applying a hand brake F to a drum D on the spindle. When the brake is released the centre rotates with the work without further penetration and the work may then be turned.
Patent GB-1049350-A (GB)
Title: Vinyl polymer compositions
IPC: C08L27/06
Filed: 1965-03-23
Abstract: Compositions comprise (A) 100 parts by weight of a resin binder composed of (a) 70 to 95 weight per cent of one or more vinyl polymers which is polyvinyl chloride, a copolymer of vinyl chloride with not more than 50 weight per cent of vinyl acetate or vinylidene chloride or a mixture of such polymer or copolymer with polyvinyl acetate or polyvinylidene chloride, the mixture containing at least 50 weight per cent of vinyl chloride polymer, and (b) 5 to 30 weight per cent of a chlorinated linear polyethylene having a chlorine content of 35 to 55 weight per cent, a crystallinity between 8 and 35% as measured by differential thermal analysis, a glass transition temperature in the range 19 DEG  \sB 21 DEG  to 71 DEG  \sB 7 DEG  C. depending on the chlorine content and defined by a graph (not shown), and a molecular weight corresponding to an intrinsic viscosity of 3.0 to 6.0 in o-dichlorobenzene at 100 DEG  C.; (B) 20 to 60 parts by weight of a plasticizer for the resin binder; and (C) 250 to 600 parts by weight of a filler.  Specified plasticizers are tricresyl phosphate, dioctyl phthalate, diisodecyl phthalate, butyl cyclohexyl phthalate, dicyclohexyl phthalate, dicapryl phthalate, dioctyl adipate, dibutyl sebacate and epoxidized soya bean oil. Specified fillers are clays, calcium carbonate, barytes, asbestine, talc, calcium sulphate, silica, mica, titanium dioxide, carbon black, phthalocyanines, chrome yellows, asbestos, cork and wood flour.  The compositions may also contain stabilizers, e.g. metal salts, and may be calendered to form floor covering materials and tiles.  Examples describe compositions comprising chlorinated polyethylene, stearic acid, barium/zinc soap, calcium carbonate and (1) polyvinyl chloride, dioctyl phthalate, epoxidized soya bean oil, titanium dioxide and polyethylene wax and (3) vinyl chloride/vinyl acetate copolymer, butyl cyclohexyl phthalate and asbestos.
Patent GB-1456748-A (GB)
Title: Combined thrust- and radial bearing
IPC: F16C25/08
Filed: 1974-03-20
Abstract: 1456748 Bearings NADELLA 20 March 1974 [21 March 1973] 12300/74 Heading F2A A combined thrust and radial bearing comprises a radial roller or needle bearing 7 and at least one annular plate 16 constituting a thrust raceway or slideway, there being at least one axially deformable annular elastically yieldable means 15 applied against the plate, the rollers or needles 7, the plate, and the means 15 being enclosed in a common housing 9 of pressed sheet metal. The yieldable means 15 comprise an elastomeric pad; in a further embodiment (Fig. 2, not shown), the pad and the thrust bearing rollers 5 are interchanged. The yieldable means alternatively comprise an axially deformable metal washer having a conically shaped portion and located between the plate and the radially extending portion of the housing 9. The thrust bearing may be a sliding bearing.
Patent GB-1412228-A (GB)
Title: Colour-photographic multi-layered material with colour density
IPC: G03C7/392
Filed: 1974-03-20
Abstract: 1412228 Photographic silver halide colour materials AGFA-GEVAERT AG 20 March 1974 [23 March 1973] 12341/74 Heading G2C A photographic colour material contains at least one light-sensitive silver halide emulsion layer and adjacent thereto a filter or anti-halation layer containing colloidal silver and 0.02 to 1 gram of at least one spectral sensitizing dye per gram of silver. Sensitizing dyes specified are of the cyanine, carlsocyanine, azacyanine and merocyanine types, and the dye is preferably a sensitizer for the same region of the spectrum as that to which the adjacent light-sensitive layer is sensitized. The dye reduces physical development occuring on the colloidal silver during colour processing which leads to reduction in colour density.
Patent GB-895958-A (GB)
Title: Improvements in post-insulators for high voltages
Inventor: TAVIN MICHEL
IPC: H01B17/14
Filed: 1960-04-07
Abstract: 895,958. Insulators. ETABLISSEMENTS MERLIN & GERIN. April 7, 1960, No. 12358/60. Addition to 885,193. Class 36. A post insulator is built up from two or more superposed columns 1, 2 or 3, each column being built up of conical shells cemented together and the columns being assembled upon one another by the juxtaposition of conical ceramic junction elements 4 or 5 each having two skirts, the junction elements nesting into the adjacent elements of the columns so that the whole structure forms a solid core with skirts. The columns may decrease in diameter from the bottom to the top of the insulator, the angle of slope and dimensions of the junction elements being chosen to suit the elements with which they engage. The vertical distance E between the skirts of a junction element preferably lies between the distance apart E2 of the skirts of the column below it and that E3 of those of the column above it.
Patent GB-494695-A (GB)
Title: Improvements in or relating to coaxial conductor electric cables
IPC: H01B11/18
Filed: 1937-04-30
Abstract: 494,695. Cab les. STANDARD TELEPHONES & CABLES, Ltd., and WESTON, W. K. April 30, 1937, No. 12373. [Class 36] A coaxial conductor air-space insulated cable comprises conductors 2, 6, Fig. 1, separated by longitudinally extending insulating strips shaped to form radial ribs 1 between the two conductors and conductor-embracing portions 8, the side surfaces 5 of adjacent ribs being in abutting contact so as positively to hold the central conductor in position. The strips may extend helically about the conductor and may consist of polystyrol, acetylated or styrenated paper, or a mixture of rubber and polystyrol. The strips may be applied to the central conductor 2, Fig. 2, from bobbins 3 and pass under guide rods 4 which bring the edges of the strips into contact and which, if the strips are not pre-shaped, impart the desired shape to the strips. Whilst the strips are held in position by the guide rods the outer conductor, which may consist of interlocking strips 7, is applied.
Patent GB-143037-A (GB)
Title: An improved apparatus for use in climbing trees, poles or the like
IPC: A63B27/00
Filed: 1919-05-16
Abstract: 143,037. Barutta, A. G. S. May 16, 1919. Climbing, body gear for aiding.-A pair of nippers formed of pivoted bars d, e having rigid extensions f, g at right-angles to them is made to encircle the tree or post as shown. The climber rests his back against a band r and progresses upwards by pressing his feet against the tree and raising the nippers in steps by a series of jerks.
Patent GB-626402-A (GB)
Title: Improvements in or relating to pivoted windows and to operating means therefor
IPC: E05D15/00
Filed: 1947-05-08
Abstract: 626,402. Windows. GROSS, S. May 8, 1947, No. 12441. [Class 20(iii)]  A window comprises a stationary frame 10 having at least one sash pivotally mounted therein on a vertical or horizontal axis parallel to one edge of the frame in such a manner that it can move either inwardly or outwardly, and provided with mechanically operated means for moving the sash about its axis from a point remote from the axis. In the form shown in Fig. 2 two casements 11, 12 and a sash 13 pivoted about an upper horizontal axis are provided, each sash having its own operating means which comprises a crank handle operating a bevel wheel 18 which rotates the hinge pin a through a second bevel 19 and worm gears 21, 22, 24, 25. The windows are locked in their closed position and draughts are excluded by arranging for portions 26, 27, Figs. 2 and 3, 30, 32, 33, Fig. 2, of the stationary frame to slide therein transversely of the frame so that these portions on being inwardly projected engage rabbets 28, 29, Fig. 3, 31, 34, 35, Fig. 2, in the sashes. Simultaneous movement of all these portions is effected by linkages 42, 61 &c. operated by a lever on a sleeve concentrically mounted about one of the window-operating cranks, the sleeve being provided with a disc having an eccentrically disposed pin engaging between two projections 42a on one of the links 42, and a pawl being provided to hold the sleeve in the desired position.
Patent GB-847016-A (GB)
Title: Improvements in or relating to a process for the preparation of and compositions comprising methyl mercuric nitrile
IPC: C07F3/10
Filed: 1958-04-22
Abstract: Methyl mercuric nitrile is prepared by reacting methyl iodide with mercury, removing any excess methyl iodide by steam distillation, reacting the methyl mercuric iodide with an alkali metal cyanide, extracting with a solvent and removing methyl mercuric nitrile from the solvent.  Preferably pure methyl iodide is reacted with pure mercury under the influence of light, e.g. from a fluorescent light source.  After removal of the unreacted methyl iodide by adding the mixture to hot water, aqueous alkali metal (e.g. sodium, potassium, lithium or ammonium) cyanide is added in about 20% excess.  The reaction mixture is then extracted with benzene, and the benzene solution then in its turn extracted with water to give a solution of methyl mercuric nitrile, which may be used in the preparation of disinfectant compositions.  (see Group VI).ALSO:Methyl mercuric nitrile may be dissolved in an organic solvent such as ethylene glycol for use in disinfecting seeds.
Patent GB-667849-A (GB)
Title: Improvements in adjustable spanners
Inventor: GARIJO EUGENIO
IPC: B25B13/16
Filed: 1950-05-22
Abstract: 667,849. Spanners. APARICIO HNOS. Y CIA. ANMA. May 22, 1950, No. 12762/50. Class 61 (iii). An adjustable spanner comprises a fixed jaw 2 having a slot 4 wherein is arranged a movable jaw 3 provided with a threaded hole 9 co-operating with the screw 5 which extends through the slot. The ends of the screw are rotatably mounted in apertures 6 in the fixed jaw and are provided with a head 7 and a milled operating head 8 respectively. In a modification the screw lies along the longitudinal axis of the spanner.
Patent GB-429499-A (GB)
Title: Improvements in refrigerator or heat retaining cabinets
IPC: F25D23/06
Filed: 1933-11-24
Abstract: 429,499. Refrigerators. MUNTERS, C. G., 35, Strandvagen, Stockholm. Nov. 24, 1933, No. 12775/35. Divided out of 429,432 under which a Specification was laid open to inspection under Sect. 91 of the Acts, May 26, 1934. [Class 29] In a heat retaining cabinet having a hermetically sealed insulating unit 2 as described in Specification 428,432 the inner shell 4 of the unit terminates short of the outer shell 3 so that the thin metal sheet 5 connecting the shells is inclined to them. The length of the path for heat leaking from one shell to the other is thus lengthened and the leakage of heat reduced. The sheet 5 is protected by a sheet 15 of svnthetic resin connecting casings 8 and 14 which protect the insulating element. Specification 429,500 also is referred to.
Patent GB-332301-A (GB)
Title: Improved control gear for fluid operated mechanism in machine tools
IPC: B24B47/06
Filed: 1929-04-24
Abstract: 332,301. Link, W. April 24, 1929. Hydraulic transmission of power.-In liquid or other fluid-operated mechanism for reciprocating the slide of a machine tool the fluid is distributed by a main valve mechanically operated by the slide, and an auxiliary valve movable relatively to and controlled by the main valve. The arrangement may comprise means for diminishing the speed of the slide at the ends of its stroke. In the form shown in Figs. 1-3, a main valve body 13 co-operates with a movable ported bushing 6, and the parts are so positioned that liquid is supplied to the working cylinder 127 from a pump 1 through a passage 2, groove 3, passage 4, port 5, and passage 7, and exhaust liquid returns to the pump through a passage 8, port 9, passage 10, groove 11 and passage 12, the bushing being held in the position shown by pressure liquid supplied through a groove 18 and passages 19, 20, 23, 25. At the end of the piston stroke, the slide turns the body 13 in a clockwise direction, and liquid is supplied through passages 21, 22, 24 to turn the bushing 6 in anti-clockwise direction, so that the ports 5, 9 now register with passages 16, 15 to cause liquid to be supplied to the passage 8 and exhausted from the passage 7. When it is desired to diminish the slide speed at the ends of its strokes, the bushing 6 is provided with additional small ports 36 - - - 39, Fig. 6, and the passages 7, 8 have branches 40 - - 43. In a modified form, a slidable valve 58, Fig. 10, controls ports 70 - - - 73 so that when the valve is moved, pressure liquid acts to move a slidable member 55 in the opposite direction.
Patent GB-1016871-A (GB)
Title: A cocktail stick
Inventor: MATHEWS RALPH JAMES
IPC: A47J43/27
Filed: 1961-04-10
Abstract: 1,016,871. Cocktail sticks. INJECTION MOULDERS Ltd. April 10, 1962 [April 10, 1961], No. 12821/61. Heading A4V. In a cocktail stick, buoyantly supporting a cherry i.e. in a drink, the stick 2 projects from a bowl or boat-shaped float 1. The stick and float are preferably integrally moulded in synthetic plastics and an ornamental finger grip 6 has a spigot 5 received in a socket formed by an axial bore in an upper part 3 of the stick and secured by adhesive. Co-operating slot and rib means may be provided on the spigot and socket to orientate the finger grip and, in a further modification the spigot is formed on the float, or a spigot on the finger grip engages a socket in the float.
Patent GB-272330-A (GB)
Title: Improvements in resilient ring elements
IPC: F16F1/32
Filed: 1926-05-20
Abstract: 272,330. Tausch, E. May 20, 1926. Locking nuts. - A dished spring washer for locking nuts comprises inner and outer rings a, b joined by a web c. Several washers may be piled to form a spring, the convex sides of adjacent washers being in engagement. The inner ring may have a greater cross-sectional area than the outer in order that the compression in the inner ring may be equal to the tension in the outer ring.
Patent GB-779650-A (GB)
Title: Pliable crease-resisting chemically insensitive membranes
IPC: G01F15/16
Filed: 1953-05-08
Abstract: 779,650. Coated fabrics for membranes. CHEMIEPRODUKTE GES. May 8, 1953 [May 9, 1952], No. 12948/53. Class 140. A pliable, crease-resisting, chemically insensitive membrane for an instrument having a membrane actuated by a fluid medium, e.g. a pressure regulator, a gas meter, or ignition apparatus for gas lighting, is a flexible woven knitted, plaited, or felted fabric carrier of polyvinyl chloride, polyamide, or polyurethane coated or impregnated on at least one side with a polyurethane formed in situ from a mixture of isocyanates and polyhydric alcohols or polyesters containing free hydroxyl groups. The mixture may be a stoichiometric mixture of di- or tri-isocyanates and polyhydric alcohol or polyester, and may contain reaction accelerators or activators. The mixture may be applied by brushing and brushing may be repeated with the same mixture. The formation of the polyurethane takes place at raised temperature, e.g. 60‹ C. Specifications 573,932 and 690,706 are referred to.